Need a good excuse.

First off didn't know whereon earth to put this, so please feel free to move to a suitable forum.

Anyhoo, well at the end of the school year, so next year about this time. There's this dinner/dance thing essentially a prom- the thing is- well to be frank- i hate almost everyone in my year(except my two best friends, where no matter our own moods we'll nearly always be in the mood for each other). The rest of the year make snide remarks about me,(mainly because i'm gay and -unfortunately, you'll know why if you live in Scotland, i have red hair, which the neds take a great delighted in pointing out)

So my main aim here is to gain:

1) An excellent excuse to tell the school why i won't be going (i have told my mum but she thinks it's because i won't wear a dress, and that the kids at school aren't that bad)

2) We pull a end of year prank, like every 6th year has, like tradition so suggestions would be nice- that are legal so no breaking into my headteachers office- I would have loved to have done that and play extremely camp songs on the tannoy but my boring friends don't want to (sigh)

Again fell free to move this if this is in the wrong forum

thank you lovely ladies (getting exciting for the prank)